Question

A boy a wagon along a horizontal surface for a distance of 10.0 meters. The boy applies a force of 15 N straight along the handle while the wagon moves, and the handle makes an angle of 35 degrees with the horizontal.
How much work does the boy do on the wagon?

• A. 150 Joules
• B. 120 Joules
• C. 86 Joules
• D. 1.5 Joules
• E. 0.67 Joules

Answer 1

The correct option is B 120 Joules

Work done by a force $W=FS$ $cos\theta$

where $\theta$ is the angle between $F$ and $S$.

Given : $F=15$ N $S=10$ m $\theta ={35}^o$

$⟹$ $W=15\times 10\times 0.8=120$ Joules